./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test6.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test6.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3ed2f79dd7eb34d7f468c81f6f234938dec012581166f8f07d8a0cec95998c6d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 05:46:35,928 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 05:46:35,931 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 05:46:35,965 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 05:46:35,965 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 05:46:35,967 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 05:46:35,969 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 05:46:35,971 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 05:46:35,973 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 05:46:35,975 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 05:46:35,976 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 05:46:35,978 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 05:46:35,978 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 05:46:35,980 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 05:46:35,981 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 05:46:35,983 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 05:46:35,984 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 05:46:35,985 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 05:46:35,988 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 05:46:35,990 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 05:46:35,992 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 05:46:35,994 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 05:46:35,996 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 05:46:35,997 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 05:46:36,001 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 05:46:36,002 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 05:46:36,002 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 05:46:36,003 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 05:46:36,004 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 05:46:36,005 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 05:46:36,006 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 05:46:36,007 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 05:46:36,008 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 05:46:36,009 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 05:46:36,010 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 05:46:36,010 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 05:46:36,011 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 05:46:36,012 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 05:46:36,012 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 05:46:36,014 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 05:46:36,015 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 05:46:36,016 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-20 05:46:36,044 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 05:46:36,044 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 05:46:36,044 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 05:46:36,045 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 05:46:36,045 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 05:46:36,046 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 05:46:36,046 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 05:46:36,046 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 05:46:36,047 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 05:46:36,047 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 05:46:36,047 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 05:46:36,047 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 05:46:36,047 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 05:46:36,048 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 05:46:36,048 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 05:46:36,048 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 05:46:36,048 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 05:46:36,048 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 05:46:36,049 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 05:46:36,049 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 05:46:36,049 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 05:46:36,049 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 05:46:36,050 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 05:46:36,050 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 05:46:36,050 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 05:46:36,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:46:36,050 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 05:46:36,051 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 05:46:36,051 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 05:46:36,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 05:46:36,051 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 05:46:36,051 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ed2f79dd7eb34d7f468c81f6f234938dec012581166f8f07d8a0cec95998c6d [2021-11-20 05:46:36,307 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 05:46:36,332 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 05:46:36,337 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 05:46:36,338 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 05:46:36,339 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 05:46:36,340 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/ldv-memsafety/memleaks_test6.i [2021-11-20 05:46:36,430 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/data/ca01a7779/7cd63b58bb97402285385c638efc3a27/FLAG1e4db3a84 [2021-11-20 05:46:36,965 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 05:46:36,965 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/sv-benchmarks/c/ldv-memsafety/memleaks_test6.i [2021-11-20 05:46:36,981 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/data/ca01a7779/7cd63b58bb97402285385c638efc3a27/FLAG1e4db3a84 [2021-11-20 05:46:37,260 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/data/ca01a7779/7cd63b58bb97402285385c638efc3a27 [2021-11-20 05:46:37,263 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 05:46:37,265 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 05:46:37,271 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 05:46:37,271 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 05:46:37,274 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 05:46:37,274 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:46:37" (1/1) ... [2021-11-20 05:46:37,275 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c8a3916 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:46:37, skipping insertion in model container [2021-11-20 05:46:37,276 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:46:37" (1/1) ... [2021-11-20 05:46:37,283 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 05:46:37,331 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 05:46:37,696 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:46:37,713 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-20 05:46:37,714 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@144422ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:46:37, skipping insertion in model container [2021-11-20 05:46:37,714 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 05:46:37,715 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-20 05:46:37,717 INFO L158 Benchmark]: Toolchain (without parser) took 451.28ms. Allocated memory is still 113.2MB. Free memory was 80.7MB in the beginning and 84.3MB in the end (delta: -3.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-20 05:46:37,718 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 113.2MB. Free memory is still 68.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 05:46:37,719 INFO L158 Benchmark]: CACSL2BoogieTranslator took 443.88ms. Allocated memory is still 113.2MB. Free memory was 80.7MB in the beginning and 84.3MB in the end (delta: -3.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-20 05:46:37,720 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 113.2MB. Free memory is still 68.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 443.88ms. Allocated memory is still 113.2MB. Free memory was 80.7MB in the beginning and 84.3MB in the end (delta: -3.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test6.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3ed2f79dd7eb34d7f468c81f6f234938dec012581166f8f07d8a0cec95998c6d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 05:46:39,878 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 05:46:39,880 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 05:46:39,912 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 05:46:39,913 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 05:46:39,914 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 05:46:39,916 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 05:46:39,919 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 05:46:39,921 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 05:46:39,923 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 05:46:39,924 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 05:46:39,926 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 05:46:39,927 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 05:46:39,928 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 05:46:39,930 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 05:46:39,932 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 05:46:39,933 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 05:46:39,934 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 05:46:39,936 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 05:46:39,939 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 05:46:39,941 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 05:46:39,943 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 05:46:39,945 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 05:46:39,946 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 05:46:39,950 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 05:46:39,950 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 05:46:39,951 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 05:46:39,952 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 05:46:39,953 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 05:46:39,954 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 05:46:39,954 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 05:46:39,955 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 05:46:39,956 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 05:46:39,957 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 05:46:39,958 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 05:46:39,976 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 05:46:39,977 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 05:46:39,982 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 05:46:39,982 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 05:46:39,983 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 05:46:39,984 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 05:46:39,985 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-11-20 05:46:40,017 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 05:46:40,017 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 05:46:40,018 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 05:46:40,018 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 05:46:40,019 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 05:46:40,019 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 05:46:40,020 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 05:46:40,020 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 05:46:40,020 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 05:46:40,020 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 05:46:40,021 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 05:46:40,021 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 05:46:40,021 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 05:46:40,021 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 05:46:40,022 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 05:46:40,022 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 05:46:40,022 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 05:46:40,022 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 05:46:40,023 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 05:46:40,023 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 05:46:40,023 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-20 05:46:40,023 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-20 05:46:40,023 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 05:46:40,024 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 05:46:40,027 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 05:46:40,027 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 05:46:40,027 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 05:46:40,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:46:40,028 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 05:46:40,029 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 05:46:40,029 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-20 05:46:40,029 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-20 05:46:40,029 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 05:46:40,030 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 05:46:40,030 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ed2f79dd7eb34d7f468c81f6f234938dec012581166f8f07d8a0cec95998c6d [2021-11-20 05:46:40,436 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 05:46:40,463 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 05:46:40,466 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 05:46:40,469 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 05:46:40,470 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 05:46:40,472 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/ldv-memsafety/memleaks_test6.i [2021-11-20 05:46:40,553 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/data/e0a138f2a/5e73c8966a9342ac924235d07357f97a/FLAG74a39f942 [2021-11-20 05:46:41,113 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 05:46:41,114 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/sv-benchmarks/c/ldv-memsafety/memleaks_test6.i [2021-11-20 05:46:41,139 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/data/e0a138f2a/5e73c8966a9342ac924235d07357f97a/FLAG74a39f942 [2021-11-20 05:46:41,401 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/data/e0a138f2a/5e73c8966a9342ac924235d07357f97a [2021-11-20 05:46:41,404 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 05:46:41,406 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 05:46:41,409 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 05:46:41,409 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 05:46:41,416 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 05:46:41,417 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:46:41" (1/1) ... [2021-11-20 05:46:41,418 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28bdda53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:46:41, skipping insertion in model container [2021-11-20 05:46:41,419 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:46:41" (1/1) ... [2021-11-20 05:46:41,426 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 05:46:41,477 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 05:46:41,961 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:46:41,987 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-20 05:46:42,008 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 05:46:42,091 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:46:42,113 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 05:46:42,204 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 05:46:42,278 INFO L208 MainTranslator]: Completed translation [2021-11-20 05:46:42,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:46:42 WrapperNode [2021-11-20 05:46:42,279 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 05:46:42,281 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 05:46:42,282 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 05:46:42,282 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 05:46:42,290 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:46:42" (1/1) ... [2021-11-20 05:46:42,328 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:46:42" (1/1) ... [2021-11-20 05:46:42,354 INFO L137 Inliner]: procedures = 169, calls = 79, calls flagged for inlining = 25, calls inlined = 7, statements flattened = 61 [2021-11-20 05:46:42,354 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 05:46:42,355 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 05:46:42,355 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 05:46:42,356 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 05:46:42,366 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:46:42" (1/1) ... [2021-11-20 05:46:42,366 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:46:42" (1/1) ... [2021-11-20 05:46:42,371 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:46:42" (1/1) ... [2021-11-20 05:46:42,371 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:46:42" (1/1) ... [2021-11-20 05:46:42,380 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:46:42" (1/1) ... [2021-11-20 05:46:42,383 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:46:42" (1/1) ... [2021-11-20 05:46:42,385 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:46:42" (1/1) ... [2021-11-20 05:46:42,389 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 05:46:42,390 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 05:46:42,390 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 05:46:42,390 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 05:46:42,391 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:46:42" (1/1) ... [2021-11-20 05:46:42,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 05:46:42,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 05:46:42,432 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 05:46:42,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 05:46:42,472 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-20 05:46:42,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-20 05:46:42,472 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 05:46:42,473 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 05:46:42,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 05:46:42,473 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 05:46:42,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 05:46:42,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 05:46:42,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 05:46:42,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 05:46:42,685 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 05:46:42,687 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 05:46:43,027 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 05:46:43,034 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 05:46:43,034 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-20 05:46:43,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:46:43 BoogieIcfgContainer [2021-11-20 05:46:43,037 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 05:46:43,038 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 05:46:43,039 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 05:46:43,042 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 05:46:43,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:46:41" (1/3) ... [2021-11-20 05:46:43,043 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b742786 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:46:43, skipping insertion in model container [2021-11-20 05:46:43,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:46:42" (2/3) ... [2021-11-20 05:46:43,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b742786 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:46:43, skipping insertion in model container [2021-11-20 05:46:43,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:46:43" (3/3) ... [2021-11-20 05:46:43,045 INFO L111 eAbstractionObserver]: Analyzing ICFG memleaks_test6.i [2021-11-20 05:46:43,058 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 05:46:43,058 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2021-11-20 05:46:43,121 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 05:46:43,129 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 05:46:43,130 INFO L340 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2021-11-20 05:46:43,159 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 40 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:46:43,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-20 05:46:43,169 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:46:43,170 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:46:43,171 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-11-20 05:46:43,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:46:43,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1405574468, now seen corresponding path program 1 times [2021-11-20 05:46:43,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:46:43,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [256301133] [2021-11-20 05:46:43,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:46:43,192 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:46:43,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:46:43,195 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:46:43,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-20 05:46:43,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:46:43,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 05:46:43,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:46:43,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:46:43,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:46:43,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:46:43,560 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:46:43,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [256301133] [2021-11-20 05:46:43,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [256301133] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:46:43,561 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:46:43,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-20 05:46:43,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982311930] [2021-11-20 05:46:43,565 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:46:43,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:46:43,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:46:43,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:46:43,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:46:43,605 INFO L87 Difference]: Start difference. First operand has 43 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 40 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:46:43,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:46:43,691 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2021-11-20 05:46:43,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:46:43,694 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-11-20 05:46:43,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:46:43,703 INFO L225 Difference]: With dead ends: 80 [2021-11-20 05:46:43,704 INFO L226 Difference]: Without dead ends: 76 [2021-11-20 05:46:43,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:46:43,709 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 37 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:46:43,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 215 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:46:43,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-20 05:46:43,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 45. [2021-11-20 05:46:43,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 41 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 05:46:43,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-11-20 05:46:43,764 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 12 [2021-11-20 05:46:43,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:46:43,766 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-11-20 05:46:43,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:46:43,767 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-11-20 05:46:43,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-20 05:46:43,768 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:46:43,768 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:46:43,792 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-20 05:46:43,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:46:43,981 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-11-20 05:46:43,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:46:43,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1405608821, now seen corresponding path program 1 times [2021-11-20 05:46:43,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:46:43,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [936104153] [2021-11-20 05:46:43,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:46:43,984 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:46:43,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:46:43,986 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:46:43,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-20 05:46:44,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:46:44,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 05:46:44,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:46:44,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:46:44,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:46:44,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:46:44,177 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:46:44,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [936104153] [2021-11-20 05:46:44,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [936104153] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:46:44,178 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:46:44,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-20 05:46:44,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151435747] [2021-11-20 05:46:44,179 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:46:44,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:46:44,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:46:44,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:46:44,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:46:44,183 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:46:44,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:46:44,218 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-11-20 05:46:44,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:46:44,219 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-11-20 05:46:44,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:46:44,221 INFO L225 Difference]: With dead ends: 44 [2021-11-20 05:46:44,221 INFO L226 Difference]: Without dead ends: 44 [2021-11-20 05:46:44,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:46:44,223 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 32 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:46:44,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 119 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:46:44,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-20 05:46:44,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-11-20 05:46:44,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 40 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 05:46:44,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2021-11-20 05:46:44,231 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 12 [2021-11-20 05:46:44,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:46:44,232 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2021-11-20 05:46:44,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:46:44,232 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2021-11-20 05:46:44,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-20 05:46:44,233 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:46:44,233 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:46:44,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-20 05:46:44,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:46:44,445 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-11-20 05:46:44,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:46:44,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1146582493, now seen corresponding path program 1 times [2021-11-20 05:46:44,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:46:44,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [497123889] [2021-11-20 05:46:44,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:46:44,447 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:46:44,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:46:44,451 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:46:44,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-20 05:46:44,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:46:44,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 05:46:44,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:46:44,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:46:44,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:46:44,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:46:44,853 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:46:44,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [497123889] [2021-11-20 05:46:44,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [497123889] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:46:44,855 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:46:44,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-11-20 05:46:44,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852363465] [2021-11-20 05:46:44,856 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:46:44,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 05:46:44,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:46:44,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 05:46:44,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:46:44,859 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:46:45,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:46:45,012 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2021-11-20 05:46:45,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:46:45,014 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 12 [2021-11-20 05:46:45,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:46:45,015 INFO L225 Difference]: With dead ends: 60 [2021-11-20 05:46:45,015 INFO L226 Difference]: Without dead ends: 60 [2021-11-20 05:46:45,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:46:45,017 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 70 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:46:45,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 63 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:46:45,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-20 05:46:45,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 47. [2021-11-20 05:46:45,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 32 states have (on average 1.5625) internal successors, (50), 43 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 05:46:45,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2021-11-20 05:46:45,037 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 12 [2021-11-20 05:46:45,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:46:45,038 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2021-11-20 05:46:45,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:46:45,039 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2021-11-20 05:46:45,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-20 05:46:45,041 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:46:45,044 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:46:45,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-20 05:46:45,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:46:45,264 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-11-20 05:46:45,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:46:45,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1146582492, now seen corresponding path program 1 times [2021-11-20 05:46:45,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:46:45,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [36622093] [2021-11-20 05:46:45,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:46:45,266 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:46:45,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:46:45,267 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:46:45,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-20 05:46:45,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:46:45,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 05:46:45,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:46:45,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:46:45,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:46:45,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:46:45,858 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:46:45,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [36622093] [2021-11-20 05:46:45,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [36622093] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:46:45,858 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:46:45,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-11-20 05:46:45,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131571764] [2021-11-20 05:46:45,859 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:46:45,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 05:46:45,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:46:45,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 05:46:45,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 05:46:45,860 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:46:46,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:46:46,052 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2021-11-20 05:46:46,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:46:46,054 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 12 [2021-11-20 05:46:46,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:46:46,056 INFO L225 Difference]: With dead ends: 80 [2021-11-20 05:46:46,056 INFO L226 Difference]: Without dead ends: 80 [2021-11-20 05:46:46,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:46:46,058 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 42 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:46:46,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 162 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:46:46,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-20 05:46:46,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 67. [2021-11-20 05:46:46,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 52 states have (on average 1.6153846153846154) internal successors, (84), 63 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 05:46:46,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 87 transitions. [2021-11-20 05:46:46,070 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 87 transitions. Word has length 12 [2021-11-20 05:46:46,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:46:46,071 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 87 transitions. [2021-11-20 05:46:46,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:46:46,071 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 87 transitions. [2021-11-20 05:46:46,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-20 05:46:46,072 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:46:46,073 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:46:46,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-20 05:46:46,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:46:46,285 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-11-20 05:46:46,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:46:46,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1146582909, now seen corresponding path program 1 times [2021-11-20 05:46:46,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:46:46,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1966134497] [2021-11-20 05:46:46,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:46:46,287 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:46:46,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:46:46,289 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:46:46,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-20 05:46:46,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:46:46,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 05:46:46,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:46:46,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:46:46,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:46:46,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:46:46,470 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:46:46,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1966134497] [2021-11-20 05:46:46,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1966134497] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:46:46,470 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:46:46,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-20 05:46:46,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674391333] [2021-11-20 05:46:46,471 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:46:46,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 05:46:46,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:46:46,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 05:46:46,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-20 05:46:46,474 INFO L87 Difference]: Start difference. First operand 67 states and 87 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:46:46,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:46:46,572 INFO L93 Difference]: Finished difference Result 84 states and 99 transitions. [2021-11-20 05:46:46,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 05:46:46,573 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 12 [2021-11-20 05:46:46,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:46:46,574 INFO L225 Difference]: With dead ends: 84 [2021-11-20 05:46:46,575 INFO L226 Difference]: Without dead ends: 84 [2021-11-20 05:46:46,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-20 05:46:46,576 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 50 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:46:46,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 218 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:46:46,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-20 05:46:46,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2021-11-20 05:46:46,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 65 states have internal predecessors, (84), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 05:46:46,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 87 transitions. [2021-11-20 05:46:46,588 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 87 transitions. Word has length 12 [2021-11-20 05:46:46,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:46:46,588 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 87 transitions. [2021-11-20 05:46:46,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:46:46,589 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 87 transitions. [2021-11-20 05:46:46,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 05:46:46,590 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:46:46,590 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:46:46,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-20 05:46:46,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:46:46,801 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-11-20 05:46:46,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:46:46,802 INFO L85 PathProgramCache]: Analyzing trace with hash 624200559, now seen corresponding path program 1 times [2021-11-20 05:46:46,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:46:46,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2071114729] [2021-11-20 05:46:46,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:46:46,803 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:46:46,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:46:46,804 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:46:46,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-20 05:46:46,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:46:46,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 05:46:46,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:46:47,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:46:47,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:46:47,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:46:47,135 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:46:47,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2071114729] [2021-11-20 05:46:47,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2071114729] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:46:47,135 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:46:47,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 8 [2021-11-20 05:46:47,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041881834] [2021-11-20 05:46:47,136 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:46:47,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 05:46:47,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:46:47,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 05:46:47,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-20 05:46:47,137 INFO L87 Difference]: Start difference. First operand 69 states and 87 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:46:47,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:46:47,272 INFO L93 Difference]: Finished difference Result 79 states and 87 transitions. [2021-11-20 05:46:47,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 05:46:47,276 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 13 [2021-11-20 05:46:47,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:46:47,277 INFO L225 Difference]: With dead ends: 79 [2021-11-20 05:46:47,277 INFO L226 Difference]: Without dead ends: 79 [2021-11-20 05:46:47,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-20 05:46:47,278 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 93 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:46:47,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 168 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:46:47,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-20 05:46:47,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2021-11-20 05:46:47,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 54 states have (on average 1.5185185185185186) internal successors, (82), 64 states have internal predecessors, (82), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 05:46:47,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 85 transitions. [2021-11-20 05:46:47,292 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 85 transitions. Word has length 13 [2021-11-20 05:46:47,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:46:47,292 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 85 transitions. [2021-11-20 05:46:47,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:46:47,295 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 85 transitions. [2021-11-20 05:46:47,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 05:46:47,296 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:46:47,296 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:46:47,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-20 05:46:47,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:46:47,508 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-11-20 05:46:47,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:46:47,509 INFO L85 PathProgramCache]: Analyzing trace with hash -2124619081, now seen corresponding path program 1 times [2021-11-20 05:46:47,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:46:47,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [76946674] [2021-11-20 05:46:47,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:46:47,510 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:46:47,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:46:47,512 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:46:47,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-20 05:46:47,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:46:47,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 05:46:47,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:46:47,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 05:46:47,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:46:47,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:46:47,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:46:47,747 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:46:47,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [76946674] [2021-11-20 05:46:47,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [76946674] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:46:47,748 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:46:47,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-20 05:46:47,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674631095] [2021-11-20 05:46:47,748 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:46:47,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:46:47,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:46:47,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:46:47,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:46:47,750 INFO L87 Difference]: Start difference. First operand 68 states and 85 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:46:47,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:46:47,872 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2021-11-20 05:46:47,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:46:47,873 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-11-20 05:46:47,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:46:47,874 INFO L225 Difference]: With dead ends: 79 [2021-11-20 05:46:47,874 INFO L226 Difference]: Without dead ends: 79 [2021-11-20 05:46:47,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:46:47,876 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 23 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:46:47,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 119 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:46:47,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-20 05:46:47,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2021-11-20 05:46:47,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 54 states have (on average 1.5) internal successors, (81), 64 states have internal predecessors, (81), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 05:46:47,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2021-11-20 05:46:47,884 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 14 [2021-11-20 05:46:47,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:46:47,884 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2021-11-20 05:46:47,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:46:47,884 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2021-11-20 05:46:47,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 05:46:47,885 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:46:47,885 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:46:47,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-20 05:46:48,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:46:48,097 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-11-20 05:46:48,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:46:48,098 INFO L85 PathProgramCache]: Analyzing trace with hash -2124571317, now seen corresponding path program 1 times [2021-11-20 05:46:48,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:46:48,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1282226254] [2021-11-20 05:46:48,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:46:48,099 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:46:48,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:46:48,100 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:46:48,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-20 05:46:48,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:46:48,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 05:46:48,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:46:50,472 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 05:46:50,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-11-20 05:46:50,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:46:50,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:47:06,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:06,146 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:47:06,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1282226254] [2021-11-20 05:47:06,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1282226254] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:47:06,146 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:47:06,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 10 [2021-11-20 05:47:06,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492442294] [2021-11-20 05:47:06,147 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:47:06,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 05:47:06,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:47:06,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 05:47:06,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=98, Unknown=6, NotChecked=0, Total=132 [2021-11-20 05:47:06,149 INFO L87 Difference]: Start difference. First operand 68 states and 84 transitions. Second operand has 12 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:47:06,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:47:06,343 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2021-11-20 05:47:06,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 05:47:06,344 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 14 [2021-11-20 05:47:06,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:47:06,346 INFO L225 Difference]: With dead ends: 71 [2021-11-20 05:47:06,346 INFO L226 Difference]: Without dead ends: 71 [2021-11-20 05:47:06,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=36, Invalid=114, Unknown=6, NotChecked=0, Total=156 [2021-11-20 05:47:06,347 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 94 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:47:06,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 197 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 31 Invalid, 0 Unknown, 96 Unchecked, 0.1s Time] [2021-11-20 05:47:06,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-20 05:47:06,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2021-11-20 05:47:06,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 54 states have (on average 1.4444444444444444) internal successors, (78), 63 states have internal predecessors, (78), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 05:47:06,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2021-11-20 05:47:06,357 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 14 [2021-11-20 05:47:06,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:47:06,358 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2021-11-20 05:47:06,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:47:06,358 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2021-11-20 05:47:06,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 05:47:06,360 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:47:06,360 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:47:06,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-20 05:47:06,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:47:06,561 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-11-20 05:47:06,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:47:06,562 INFO L85 PathProgramCache]: Analyzing trace with hash -2124571318, now seen corresponding path program 1 times [2021-11-20 05:47:06,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:47:06,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2047258323] [2021-11-20 05:47:06,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:47:06,563 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:47:06,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:47:06,566 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:47:06,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-20 05:47:06,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:47:06,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 05:47:06,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:47:06,800 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-20 05:47:06,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2021-11-20 05:47:06,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:06,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:47:07,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:07,212 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:47:07,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2047258323] [2021-11-20 05:47:07,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2047258323] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:47:07,213 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:47:07,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 3] imperfect sequences [] total 7 [2021-11-20 05:47:07,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833625756] [2021-11-20 05:47:07,213 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:47:07,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 05:47:07,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:47:07,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 05:47:07,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-20 05:47:07,215 INFO L87 Difference]: Start difference. First operand 67 states and 81 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:47:07,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:47:07,463 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2021-11-20 05:47:07,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 05:47:07,464 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 14 [2021-11-20 05:47:07,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:47:07,465 INFO L225 Difference]: With dead ends: 70 [2021-11-20 05:47:07,465 INFO L226 Difference]: Without dead ends: 70 [2021-11-20 05:47:07,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-20 05:47:07,467 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 59 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:47:07,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 106 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 15 Unchecked, 0.1s Time] [2021-11-20 05:47:07,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-20 05:47:07,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2021-11-20 05:47:07,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 54 states have (on average 1.4259259259259258) internal successors, (77), 62 states have internal predecessors, (77), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 05:47:07,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 80 transitions. [2021-11-20 05:47:07,476 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 80 transitions. Word has length 14 [2021-11-20 05:47:07,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:47:07,477 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 80 transitions. [2021-11-20 05:47:07,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:47:07,478 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 80 transitions. [2021-11-20 05:47:07,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 05:47:07,479 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:47:07,479 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:47:07,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-20 05:47:07,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:47:07,693 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-11-20 05:47:07,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:47:07,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1940820388, now seen corresponding path program 1 times [2021-11-20 05:47:07,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:47:07,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1961283258] [2021-11-20 05:47:07,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:47:07,695 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:47:07,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:47:07,698 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:47:07,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-20 05:47:07,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:47:07,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 05:47:07,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:47:07,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:07,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:47:07,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:07,914 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:47:07,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1961283258] [2021-11-20 05:47:07,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1961283258] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:47:07,914 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:47:07,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-20 05:47:07,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259140106] [2021-11-20 05:47:07,915 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:47:07,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:47:07,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:47:07,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:47:07,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:47:07,916 INFO L87 Difference]: Start difference. First operand 66 states and 80 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:47:08,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:47:08,046 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2021-11-20 05:47:08,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:47:08,047 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-11-20 05:47:08,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:47:08,049 INFO L225 Difference]: With dead ends: 73 [2021-11-20 05:47:08,049 INFO L226 Difference]: Without dead ends: 68 [2021-11-20 05:47:08,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:47:08,050 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 21 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:47:08,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 124 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:47:08,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-20 05:47:08,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2021-11-20 05:47:08,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 51 states have (on average 1.411764705882353) internal successors, (72), 59 states have internal predecessors, (72), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 05:47:08,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2021-11-20 05:47:08,058 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 14 [2021-11-20 05:47:08,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:47:08,058 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2021-11-20 05:47:08,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:47:08,059 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2021-11-20 05:47:08,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 05:47:08,060 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:47:08,060 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:47:08,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-20 05:47:08,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:47:08,274 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-11-20 05:47:08,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:47:08,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1973834710, now seen corresponding path program 1 times [2021-11-20 05:47:08,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:47:08,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1574542399] [2021-11-20 05:47:08,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:47:08,275 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:47:08,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:47:08,277 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:47:08,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-20 05:47:08,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:47:08,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 05:47:08,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:47:08,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:08,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:47:08,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:08,530 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:47:08,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1574542399] [2021-11-20 05:47:08,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1574542399] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:47:08,530 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:47:08,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-20 05:47:08,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209648086] [2021-11-20 05:47:08,531 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:47:08,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:47:08,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:47:08,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:47:08,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:47:08,532 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:47:08,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:47:08,570 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2021-11-20 05:47:08,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 05:47:08,572 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-11-20 05:47:08,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:47:08,573 INFO L225 Difference]: With dead ends: 43 [2021-11-20 05:47:08,573 INFO L226 Difference]: Without dead ends: 39 [2021-11-20 05:47:08,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:47:08,574 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:47:08,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 151 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:47:08,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-20 05:47:08,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-11-20 05:47:08,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 36 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:47:08,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2021-11-20 05:47:08,580 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 14 [2021-11-20 05:47:08,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:47:08,581 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2021-11-20 05:47:08,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:47:08,581 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2021-11-20 05:47:08,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 05:47:08,582 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:47:08,582 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:47:08,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-20 05:47:08,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:47:08,783 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-11-20 05:47:08,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:47:08,784 INFO L85 PathProgramCache]: Analyzing trace with hash 406071093, now seen corresponding path program 1 times [2021-11-20 05:47:08,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:47:08,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [552662311] [2021-11-20 05:47:08,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:47:08,785 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:47:08,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:47:08,786 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:47:08,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-20 05:47:08,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:47:08,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 05:47:08,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:47:09,043 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 05:47:09,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 32 [2021-11-20 05:47:09,413 INFO L354 Elim1Store]: treesize reduction 20, result has 28.6 percent of original size [2021-11-20 05:47:09,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 40 [2021-11-20 05:47:09,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:09,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:47:09,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:09,985 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:47:09,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [552662311] [2021-11-20 05:47:09,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [552662311] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:47:09,985 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:47:09,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 11 [2021-11-20 05:47:09,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944327209] [2021-11-20 05:47:09,986 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:47:09,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 05:47:09,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:47:09,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 05:47:09,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-20 05:47:09,987 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:47:12,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:47:12,137 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2021-11-20 05:47:12,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 05:47:12,138 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-11-20 05:47:12,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:47:12,139 INFO L225 Difference]: With dead ends: 40 [2021-11-20 05:47:12,139 INFO L226 Difference]: Without dead ends: 40 [2021-11-20 05:47:12,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=58, Invalid=151, Unknown=1, NotChecked=0, Total=210 [2021-11-20 05:47:12,141 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 15 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:47:12,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 122 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2021-11-20 05:47:12,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-20 05:47:12,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-11-20 05:47:12,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 36 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:47:12,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2021-11-20 05:47:12,145 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 17 [2021-11-20 05:47:12,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:47:12,146 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2021-11-20 05:47:12,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:47:12,147 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2021-11-20 05:47:12,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 05:47:12,147 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:47:12,148 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:47:12,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-20 05:47:12,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:47:12,357 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-11-20 05:47:12,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:47:12,357 INFO L85 PathProgramCache]: Analyzing trace with hash 406071094, now seen corresponding path program 1 times [2021-11-20 05:47:12,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:47:12,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1330745767] [2021-11-20 05:47:12,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:47:12,358 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:47:12,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:47:12,360 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:47:12,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-20 05:47:12,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:47:12,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 05:47:12,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:47:14,696 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 05:47:14,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-11-20 05:47:14,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:14,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:47:26,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:26,329 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:47:26,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1330745767] [2021-11-20 05:47:26,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1330745767] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:47:26,330 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:47:26,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 8 [2021-11-20 05:47:26,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264395615] [2021-11-20 05:47:26,330 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:47:26,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 05:47:26,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:47:26,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 05:47:26,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=57, Unknown=5, NotChecked=0, Total=90 [2021-11-20 05:47:26,332 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:47:26,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:47:26,461 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2021-11-20 05:47:26,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:47:26,462 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-11-20 05:47:26,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:47:26,463 INFO L225 Difference]: With dead ends: 38 [2021-11-20 05:47:26,463 INFO L226 Difference]: Without dead ends: 38 [2021-11-20 05:47:26,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=46, Invalid=81, Unknown=5, NotChecked=0, Total=132 [2021-11-20 05:47:26,464 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 33 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:47:26,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 63 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2021-11-20 05:47:26,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-20 05:47:26,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-20 05:47:26,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 35 states have internal predecessors, (38), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:47:26,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-11-20 05:47:26,468 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 17 [2021-11-20 05:47:26,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:47:26,469 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-11-20 05:47:26,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:47:26,469 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-11-20 05:47:26,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 05:47:26,470 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:47:26,471 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:47:26,486 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-20 05:47:26,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:47:26,685 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-11-20 05:47:26,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:47:26,685 INFO L85 PathProgramCache]: Analyzing trace with hash 861631573, now seen corresponding path program 1 times [2021-11-20 05:47:26,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:47:26,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1699473121] [2021-11-20 05:47:26,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:47:26,686 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:47:26,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:47:26,687 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:47:26,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-20 05:47:26,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:47:26,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 05:47:26,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:47:27,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:27,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:47:27,264 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 05:47:27,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2021-11-20 05:47:27,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:27,792 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:47:27,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1699473121] [2021-11-20 05:47:27,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1699473121] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:47:27,793 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:47:27,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 9 [2021-11-20 05:47:27,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576442891] [2021-11-20 05:47:27,793 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:47:27,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 05:47:27,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:47:27,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 05:47:27,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-20 05:47:27,794 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 10 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:47:28,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:47:28,002 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2021-11-20 05:47:28,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 05:47:28,003 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 10 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-11-20 05:47:28,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:47:28,003 INFO L225 Difference]: With dead ends: 41 [2021-11-20 05:47:28,004 INFO L226 Difference]: Without dead ends: 41 [2021-11-20 05:47:28,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-20 05:47:28,005 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 85 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:47:28,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 101 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:47:28,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-20 05:47:28,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2021-11-20 05:47:28,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 34 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:47:28,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2021-11-20 05:47:28,009 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 18 [2021-11-20 05:47:28,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:47:28,010 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-11-20 05:47:28,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 10 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:47:28,011 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2021-11-20 05:47:28,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 05:47:28,012 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:47:28,012 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:47:28,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-20 05:47:28,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:47:28,225 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-11-20 05:47:28,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:47:28,225 INFO L85 PathProgramCache]: Analyzing trace with hash 861631572, now seen corresponding path program 1 times [2021-11-20 05:47:28,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:47:28,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1778134798] [2021-11-20 05:47:28,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:47:28,226 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:47:28,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:47:28,227 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:47:28,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-20 05:47:28,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:47:28,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 05:47:28,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:47:28,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:28,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:47:28,441 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 05:47:28,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2021-11-20 05:47:28,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:28,500 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:47:28,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1778134798] [2021-11-20 05:47:28,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1778134798] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:47:28,500 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:47:28,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-20 05:47:28,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933142753] [2021-11-20 05:47:28,501 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:47:28,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 05:47:28,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:47:28,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 05:47:28,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:47:28,502 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:47:28,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:47:28,639 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2021-11-20 05:47:28,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 05:47:28,640 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-11-20 05:47:28,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:47:28,641 INFO L225 Difference]: With dead ends: 37 [2021-11-20 05:47:28,641 INFO L226 Difference]: Without dead ends: 37 [2021-11-20 05:47:28,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 05:47:28,642 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 50 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 05:47:28,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 49 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 05:47:28,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-20 05:47:28,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2021-11-20 05:47:28,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 33 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:47:28,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-11-20 05:47:28,646 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 18 [2021-11-20 05:47:28,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:47:28,647 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-11-20 05:47:28,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:47:28,648 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-11-20 05:47:28,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 05:47:28,649 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:47:28,649 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:47:28,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-20 05:47:28,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:47:28,850 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-11-20 05:47:28,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:47:28,851 INFO L85 PathProgramCache]: Analyzing trace with hash -607702474, now seen corresponding path program 1 times [2021-11-20 05:47:28,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:47:28,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [317860326] [2021-11-20 05:47:28,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:47:28,851 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:47:28,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:47:28,853 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:47:28,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-20 05:47:28,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:47:28,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 05:47:28,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:47:29,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:29,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:47:35,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:35,965 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:47:35,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [317860326] [2021-11-20 05:47:35,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [317860326] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:47:35,965 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:47:35,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-20 05:47:35,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312948567] [2021-11-20 05:47:35,966 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:47:35,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 05:47:35,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:47:35,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 05:47:35,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=117, Unknown=9, NotChecked=0, Total=156 [2021-11-20 05:47:35,968 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 13 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:47:36,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:47:36,213 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-11-20 05:47:36,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 05:47:36,213 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2021-11-20 05:47:36,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:47:36,214 INFO L225 Difference]: With dead ends: 42 [2021-11-20 05:47:36,214 INFO L226 Difference]: Without dead ends: 34 [2021-11-20 05:47:36,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=36, Invalid=137, Unknown=9, NotChecked=0, Total=182 [2021-11-20 05:47:36,216 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 23 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:47:36,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 162 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 53 Unchecked, 0.2s Time] [2021-11-20 05:47:36,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-20 05:47:36,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2021-11-20 05:47:36,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 28 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:47:36,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-11-20 05:47:36,220 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 19 [2021-11-20 05:47:36,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:47:36,220 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-11-20 05:47:36,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 05:47:36,221 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-11-20 05:47:36,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 05:47:36,221 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:47:36,221 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:47:36,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-20 05:47:36,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:47:36,440 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-11-20 05:47:36,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:47:36,440 INFO L85 PathProgramCache]: Analyzing trace with hash 940774974, now seen corresponding path program 1 times [2021-11-20 05:47:36,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:47:36,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [647881511] [2021-11-20 05:47:36,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:47:36,441 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:47:36,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:47:36,442 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:47:36,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-20 05:47:36,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:47:36,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 05:47:36,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:47:36,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 05:47:36,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-20 05:47:36,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:36,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:47:36,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-20 05:47:37,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:37,030 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:47:37,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [647881511] [2021-11-20 05:47:37,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [647881511] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:47:37,031 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:47:37,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 8 [2021-11-20 05:47:37,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501127118] [2021-11-20 05:47:37,032 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:47:37,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 05:47:37,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:47:37,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 05:47:37,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-20 05:47:37,034 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:47:37,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:47:37,371 INFO L93 Difference]: Finished difference Result 33 states and 32 transitions. [2021-11-20 05:47:37,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 05:47:37,372 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-11-20 05:47:37,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:47:37,373 INFO L225 Difference]: With dead ends: 33 [2021-11-20 05:47:37,373 INFO L226 Difference]: Without dead ends: 33 [2021-11-20 05:47:37,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-11-20 05:47:37,375 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 68 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 05:47:37,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 91 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 05:47:37,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-20 05:47:37,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2021-11-20 05:47:37,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 27 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:47:37,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2021-11-20 05:47:37,378 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 19 [2021-11-20 05:47:37,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:47:37,378 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2021-11-20 05:47:37,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:47:37,379 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2021-11-20 05:47:37,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-20 05:47:37,379 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:47:37,380 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:47:37,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-20 05:47:37,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:47:37,581 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-11-20 05:47:37,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:47:37,581 INFO L85 PathProgramCache]: Analyzing trace with hash -900345610, now seen corresponding path program 1 times [2021-11-20 05:47:37,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:47:37,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [602774548] [2021-11-20 05:47:37,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:47:37,582 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:47:37,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:47:37,583 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:47:37,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-20 05:47:37,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:47:37,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 05:47:37,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:47:37,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:37,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:47:37,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:37,741 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 05:47:37,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [602774548] [2021-11-20 05:47:37,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [602774548] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 05:47:37,741 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 05:47:37,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-20 05:47:37,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460236442] [2021-11-20 05:47:37,742 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 05:47:37,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 05:47:37,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 05:47:37,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 05:47:37,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 05:47:37,744 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:47:37,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 05:47:37,763 INFO L93 Difference]: Finished difference Result 29 states and 28 transitions. [2021-11-20 05:47:37,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 05:47:37,768 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-11-20 05:47:37,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 05:47:37,769 INFO L225 Difference]: With dead ends: 29 [2021-11-20 05:47:37,769 INFO L226 Difference]: Without dead ends: 29 [2021-11-20 05:47:37,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 05:47:37,771 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 25 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 05:47:37,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 53 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 05:47:37,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-20 05:47:37,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-20 05:47:37,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 26 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:47:37,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 28 transitions. [2021-11-20 05:47:37,774 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 28 transitions. Word has length 20 [2021-11-20 05:47:37,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 05:47:37,775 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 28 transitions. [2021-11-20 05:47:37,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 05:47:37,775 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 28 transitions. [2021-11-20 05:47:37,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-20 05:47:37,776 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 05:47:37,776 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 05:47:37,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-20 05:47:37,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 05:47:37,991 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 10 more)] === [2021-11-20 05:47:37,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 05:47:37,992 INFO L85 PathProgramCache]: Analyzing trace with hash -900746796, now seen corresponding path program 1 times [2021-11-20 05:47:37,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 05:47:37,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1470796829] [2021-11-20 05:47:37,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 05:47:37,992 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 05:47:37,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 05:47:37,993 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 05:47:37,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_05cfe8eb-47bc-48a8-bef7-68038d7db781/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-20 05:47:38,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 05:47:38,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 05:47:38,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 05:47:38,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-20 05:47:38,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-20 05:47:38,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 05:47:38,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 05:47:38,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24